What is the explosive concentration range of LPG?

The explosive concentration range of LPG (liquefied petroleum gas) is recognized as being between 1.5% and 10% in air. This range is crucial for understanding the conditions under which LPG can form an explosive mixture when combined with air. When the concentration of LPG is within this range, igniting this mixture can lead to an explosion if adequately exposed to a source of ignition.

Recognizing this explosive range is vital for safety in environments where LPG is used or stored, as it allows for the implementation of appropriate preventive measures and safety protocols. Understanding the lower and upper explosive limits helps in establishing guidelines for safe handling, storage, and usage to avoid the risk of explosion.

By contrast, the other ranges provided do not accurately represent the explosive limits for LPG. For instance, the range of 1.0 and 5% is too narrow and misses the upper limit, while 2 to 20% exceeds the upper limit range. The range of 0.5 and 6% is also inaccurate since it underestimates LPG's lower flammability limit. Thus, the correct answer highlights the proper explosive concentration range for LPG, emphasizing the importance of safety in handling the gas.